EASTERN REGIONAL POWER COMMITTEE, KOLKATA

ERPC, KOLKATA 1

% OF TIME FREQUENCY LYING WITHIN IEGC BAND HAS

DECREASED

% OF TIME FREQUENCY LYING IN THE HIGH FREQUENCY

REGION HAS INCREASED

SUSTAINED OVERDRAWAL HAS SIGNIFICANTLY

DECREASED

ERPC, KOLKATA 2

ERPC, KOLKATA 3

0

10

20

30

40

50

60

70

80

90

< 49.9 Hz 49.9 -

50.05 Hz

> 50.05 Hz

Jan-18

Jan-19

0

10

20

30

40

50

60

70

80

90

< 49.9 Hz 49.9 -

50.05 Hz

> 50.05 Hz

Feb-18

Feb-19

ERPC, KOLKATA 4

0

10

20

30

40

50

60

70

80

90

< 49.9 Hz 49.9 - 50.05

Hz

> 50.05 Hz

Mar-18

Mar-19

0

10

20

30

40

50

60

70

80

90

< 49.9 Hz 49.9 - 50.05

Hz

> 50.05 Hz

Apr-18

Apr-19

ERPC, KOLKATA 5

49.2

49.4

49.6

49.8

50

50.2

50.4

Oct/

18

Nov/18

Dec/1

8

Jan/19

Feb/19

Mar/

19

Fre

q in

Hz

Max Freq

Min Freq

0

10

20

30

40

50

60

70

80

90

Oct/

18

Nov/18

Dec/1

8

Jan/19

Feb/19

Mar/

19

Perc

enta

ge

<49.90

49.9-50.05

>50.05

INSTEAD OF RELAXATION OF +/- 10 MW ON SCHEDULE, RELAXATION BASED ON % OF SCHEDULE SHALL BE GIVEN.

NO. OF METER READINGS REQUIRED FOR FINDING THE ACTUAL VALUE OF DRAWAL/ INJECTION SHOULD BE CONSIDERED FOR GIVING THE RELAXATION.

RELAXATION OF SIGN CHANGE PENALTY (FROM 6TH TO 12TH TIME BLOCK) WOULD HAVE ADVERSE EFFECT ON MANAGING FREQUENCY. POSSIBILITY OF GAMING CAN NOT BE RULED OUT.

IT IS APPREHENDED THAT THE % TIME THE FREQUENCY REMAINING BELOW 49.9 HZ SHALL INCREASE.

POOL BALALNCE MAY BE NEGATIVE IN MANY WEEKS

ERPC, KOLKATA 6

ERPC, KOLKATA 7

0

20

40

60

80

100

120

140

160

Rs in

Lakhs

4th Amend

5th Amend

0

50

100

150

200

250

BSPH

CL

JUV

NL

DV

C

GR

IDC

O

SIK

KIM

WBSET

CL

Rs in

Lakhs

4th Amend

5th Amend

GENERATORS UTILITIES

UTILITIES GENERATORS

ERPC, KOLKATA 8

0

50

100

150

200

250

300

350

BSPH

CL

JUV

NL

DV

C

GR

IDC

O

SIK

KIM

WBSET

CL

Axis

Tit

le

4th Amend

5th Amend

0

5

10

15

20

25

30

FSTPP-I &

II

KH

STPP-I

BA

RH

BRBC

L

TH

EP

TU

L

Axis

Tit

le

4th Amend

5th Amend

01/04/19-07/04/19

4th Amend 5th Amend

Payable to the Pool 6830.94383 6884.40613

Receivable from the Pool 7565.67761 7590.31139 Diff amt due capping of Gen Stations -734.73379 -705.90526

ADC due to Block-wise Violation 869.2135 312.29302

ADC due to sign change Violation 973.74302 2.67272

POOL BALANCE(ER) 1108.22273 -390.93952

Payable to RRAS Provider 94.21664 94.21664

Receivable from RRAS Provider 94.53347 94.53347

Payable to FRAS Provider 0.173 0.173

TOTAL POOL BALANCE(ER) 1108.36656 -390.79569 ERPC, KOLKATA 9

The volume limit for deviation may be made dynamic.

For the 1st time block of the day (i.e. 00.00 hrs), the volume limit for deviation (positive or negative deviation) shall be 12% of Schedule of the 1st time block or 150MW whichever is less.

Subsequently from 2nd time block onwards, the allowable volume limit for deviation shall decrease for deviation in the same direction and shall be made zero at the 12th time block.

For time blocks between 1st and 12th time blocks, the volume limit for deviation shall decrease linearly at the rate of 8.33% of Schedule of that time block or 12.5MW whichever is less.

Additional Deviation Charges at the rate of 50% of Deviation rate of the corresponding time block shall be payable by an entity for violation of volume limit in case of over-drawal/under-injection.

ERPC, KOLKATA 10

No Deviation Charges shall be receivable by an entity for

violation of volume limit in case of under-drawal/over-injection.

For sustained deviation beyond 12th time block, additional

deviation charges at the rate of 100% of Deviation rate of the

corresponding time block shall be payable by an entity for any

negative deviation (Over-drawal/under-injection)

For sustained deviation beyond 12th time block, no deviation

charges shall be receivable by an entity for any positive deviation

(Under-drawal/Over-injection)

ERPC, KOLKATA 11

When an entity changes its sign of deviation (from negative to

positive or vice-versa) in any of the 12 time blocks, the allowable

volume limit for deviation and the applicable penalty shall then

be calculated as proposed above by considering time block in

which the sign change occurred as the 1st time block.

All existing provisions of different slabs for calculation of

Additional Deviation charges for violation of volume limits and

sign change may be done away with.

ERPC, KOLKATA 12

12

11

10

9

8

7

6

5

4

3

2

1

0 0 0 0 0 0 0 0 0 0 0 0

12

11

10

9

8

7

12

11

10

9

8

7

6

12

11

10

9

8

7

6

5

4

3

2

0

2

4

6

8

10

12

14

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Series1

Series2

EXAMPLE

ERPC, KOLKATA 14

12

11

10

9

8

7

6

5

4

3

2

1

0 0 0 0 0 0 0 0 0 0 0 0

12

11

10

9

8

7

12

11

10

9

8

7

6

12

11

10

9

8

7

6

5

4

3

2

0

2

4

6

8

10

12

14

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Series1

Series2

EXAMPLE

ERPC, KOLKATA 15 -15%

-10%

-5%

0%

5%

10%

15%

T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20

DC Receivable

No DC Receivable

No ADC Payable

DC Receivable

UNDER-DRAWAL/OVER INJECTION

OVER-DRAWAL/UNDER INJECTION

ADC Payable

EXAMPLE

For first time block, score will be zero.

For deviation in the same direction, score will increase by one

point for each time block.

For change in direction of deviation, score will reduce by one

point ( Minimum Score would be ZERO).

For any day(96 blocks), total score will be computed. Graded

penalty beyond a threshold score (say 12) may be thought of.

ERPC, KOLKATA 16

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

0 0 0 0 0

0 0 0

1 0 0 0

0 0 0 0

2 3

1 3 4 3

2 5 5

3 4

2 4

6

5

EXAMPLE

ERPC, KOLKATA 18

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

21 22

23 24

1 2

3 4

5 6

5 6

7 8

9 10

11 10

11 12

13 14

15 16

17 18

19 20

1 0 0

1 2

1 2

1 2

3 4

3 2

3 4

5 6

7 6

7 8

9 10

11

0

5

10

15

20

25

30

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Series1

Series2

Series3

ERPC, KOLKATA 19